XML 40 R40.htm IDEA: XBRL DOCUMENT
v3.19.3

Leases - Additional information (Details) | 9 Months Ended
--- | ---
Sep. 30, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Lease renewal term | 10 years
Minimum |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Remaining lease term | 1 year
Maximum |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Remaining lease term | 77 years

X
- Definition Lessee, Lease, Renewal Term + References No definition available. + Details
Name: | geo_LesseeLeaseRenewalTerm
Namespace Prefix: | geo_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Lessee, Remaining Lease Term + References No definition available. + Details
Name: | geo_LesseeRemainingLeaseTerm
Namespace Prefix: | geo_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |